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They screened the thesaurus Medical Subject Heading (MeSH) of MEDLINE and independently selected the descriptors related to Dentistry. All terms included in the general descriptor Dentistry were selected (n0183). Otherdental descriptors of the thesaurus were also selected(n046); in doubtful cases, uncertainties were resolved by open discussion, and finally, a total of 229 terms were used.All the descriptors are shown in Online Resource. Then, bibliographic software (Procite), was used to make the institutional search. The most frequent institutional terms in the field address of the DOSM category databases previously generated were identified. The term related to Dentistry can appear in the address as a department name (e.g. Acta,Dept. Periodontol, Amsterdam, Netherlands), as the name of an institution (e.g. Acad Orthodont Assisting, Kennesaw, GA,USA) or both at once (e.g. Acad Ctr Dent Amsterdam, Dept Oral Microbiol, NL-1066 EA Amsterdam, Netherlands). A search strategy was adopted, taking advantage of a useful operation called truncation that can be used for word searches in a text. The truncated term used (present in the 80 % of the records) were: dent*, oral*, maxill of*, orthodont*, periodont*, odontol*, prosthodont*, endodont*, and stomatol*.After the descriptors were selected and the terms associated with dental institutions were identified, the mixed (subject + address) search strategy was performed. We worked together on the fields Topic (with 229 terms of the MeSH)and Address (consistently with the complete list of the truncated terms) joined by the Boolean operator AND. (i.e.Topic: Apicoectomy AND Address: dent* OR oral* ORmaxillof* OR orthodont* OR periodont* OR odontol* ORprosthodont* OR endodont* OR stomatol*). For example,applying this procedure to this supposition, in the period 2006–2008, the results were the following: the term apicoectomy generated 21 results.